diff options
author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
---|---|---|
committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/dnd/DragSourceContext.java | |
download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz |
obtained gcc-4.6.4.tar.bz2 from upstream website;upstream
verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.
downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.
if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
Diffstat (limited to 'libjava/classpath/java/awt/dnd/DragSourceContext.java')
-rw-r--r-- | libjava/classpath/java/awt/dnd/DragSourceContext.java | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/dnd/DragSourceContext.java b/libjava/classpath/java/awt/dnd/DragSourceContext.java new file mode 100644 index 000000000..e21b4fdae --- /dev/null +++ b/libjava/classpath/java/awt/dnd/DragSourceContext.java @@ -0,0 +1,383 @@ +/* DragSourceContext.java -- + Copyright (C) 2002 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.awt.dnd; + +import java.awt.Component; +import java.awt.Cursor; +import java.awt.Image; +import java.awt.Point; +import java.awt.datatransfer.Transferable; +import java.awt.dnd.peer.DragSourceContextPeer; +import java.io.Serializable; +import java.util.TooManyListenersException; + +/** + * @since 1.2 + */ +public class DragSourceContext + implements DragSourceListener, DragSourceMotionListener, Serializable +{ + /** + * Compatible with JDK 1.2+ + */ + static final long serialVersionUID = -115407898692194719L; + + protected static final int DEFAULT = 0; + protected static final int ENTER = 1; + protected static final int OVER = 2; + protected static final int CHANGED = 3; + + private DragSourceContextPeer peer; + private Cursor cursor; + private Transferable transferable; + private DragGestureEvent trigger; + private DragSourceListener dragSourceListener; + private boolean useCustomCursor; + private int sourceActions; + private Image image; + private Point offset; + + /** + * Initializes a drag source context. + * + * @exception IllegalArgumentException If Component or DragSource of trigger + * are null, the drag action for the trigger event is DnDConstants.ACTION_NONE + * or if the source actions for the DragGestureRecognizer associated with the + * trigger event are equal to DnDConstants.ACTION_NONE. + * @exception NullPointerException If peer, trans or trigger is null or if the + * image is not null but the offset is. + */ + public DragSourceContext (DragSourceContextPeer peer, + DragGestureEvent trigger, Cursor cursor, + Image image, Point offset, Transferable trans, + DragSourceListener dsl) + { + if (peer == null + || trigger == null || trans == null + || (image != null && offset == null)) + throw new NullPointerException (); + + if (trigger.getComponent () == null + || trigger.getDragSource () == null + || trigger.getDragAction () == DnDConstants.ACTION_NONE + || trigger.getSourceAsDragGestureRecognizer () + .getSourceActions () == DnDConstants.ACTION_NONE) + throw new IllegalArgumentException (); + + this.peer = peer; + this.trigger = trigger; + this.cursor = cursor; + this.image = image; + this.offset = offset; + this.transferable = trans; + this.dragSourceListener = dsl; + this.sourceActions = trigger.getSourceAsDragGestureRecognizer().getSourceActions(); + + setCursor(cursor); + updateCurrentCursor(trigger.getDragAction(), sourceActions, DEFAULT); + } + + /** + * Returns the DragSource object associated with the + * DragGestureEvent. + * + * @return the DragSource associated with the trigger. + */ + public DragSource getDragSource() + { + return trigger.getDragSource (); + } + + /** + * Returns the component associated with this. + * + * @return the component associated with the trigger. + */ + public Component getComponent() + { + return trigger.getComponent (); + } + + /** + * Gets the trigger associated with this. + * + * @return the trigger. + */ + public DragGestureEvent getTrigger() + { + return trigger; + } + + /** + * Returns the source actions for the DragGestureRecognizer. + * + * @return the source actions for DragGestureRecognizer. + */ + public int getSourceActions() + { + if (sourceActions == 0) + sourceActions = trigger.getSourceAsDragGestureRecognizer().getSourceActions(); + return sourceActions; + } + + /** + * Sets the cursor for this drag operation to the specified cursor. + * + * @param cursor c - the Cursor to use, or null to use the default drag + * cursor. + */ + public void setCursor(Cursor cursor) + { + if (cursor == null) + useCustomCursor = false; + else + useCustomCursor = true; + this.cursor = cursor; + peer.setCursor(cursor); + } + + /** + * Returns the current cursor or null if the default + * drag cursor is used. + * + * @return the current cursor or null. + */ + public Cursor getCursor() + { + return cursor; + } + + /** + * Adds a <code>DragSourceListener</code>. + * + * @exception TooManyListenersException If a <code>DragSourceListener</code> + * has already been added. + */ + public void addDragSourceListener (DragSourceListener dsl) + throws TooManyListenersException + { + if (dragSourceListener != null) + throw new TooManyListenersException (); + + dragSourceListener = dsl; + } + + public void removeDragSourceListener (DragSourceListener dsl) + { + if (dragSourceListener == dsl) + dragSourceListener = null; + } + + /** + * This function tells the peer that the DataFlavors have been modified. + */ + public void transferablesFlavorsChanged() + { + peer.transferablesFlavorsChanged(); + } + + /** + * Calls dragEnter on the listeners registered with this + * and with the DragSource. + * + * @param e - the DragSourceDragEvent + */ + public void dragEnter(DragSourceDragEvent e) + { + if (dragSourceListener != null) + dragSourceListener.dragEnter(e); + + DragSource ds = getDragSource(); + DragSourceListener[] dsl = ds.getDragSourceListeners(); + for (int i = 0; i < dsl.length; i++) + dsl[i].dragEnter(e); + + updateCurrentCursor(e.getDropAction(), e.getTargetActions(), ENTER); + } + + /** + * Calls dragOver on the listeners registered with this + * and with the DragSource. + * + * @param e - the DragSourceDragEvent + */ + public void dragOver(DragSourceDragEvent e) + { + if (dragSourceListener != null) + dragSourceListener.dragOver(e); + + DragSource ds = getDragSource(); + DragSourceListener[] dsl = ds.getDragSourceListeners(); + for (int i = 0; i < dsl.length; i++) + dsl[i].dragOver(e); + + updateCurrentCursor(e.getDropAction(), e.getTargetActions(), OVER); + } + + /** + * Calls dragExit on the listeners registered with this + * and with the DragSource. + * + * @param e - the DragSourceEvent + */ + public void dragExit(DragSourceEvent e) + { + if (dragSourceListener != null) + dragSourceListener.dragExit(e); + + DragSource ds = getDragSource(); + DragSourceListener[] dsl = ds.getDragSourceListeners(); + for (int i = 0; i < dsl.length; i++) + dsl[i].dragExit(e); + + updateCurrentCursor(DnDConstants.ACTION_NONE, DnDConstants.ACTION_NONE, + DEFAULT); + } + + /** + * Calls dropActionChanged on the listeners registered with this + * and with the DragSource. + * + * @param e - the DragSourceDragEvent + */ + public void dropActionChanged(DragSourceDragEvent e) + { + if (dragSourceListener != null) + dragSourceListener.dropActionChanged(e); + + DragSource ds = getDragSource(); + DragSourceListener[] dsl = ds.getDragSourceListeners(); + for (int i = 0; i < dsl.length; i++) + dsl[i].dropActionChanged(e); + + updateCurrentCursor(e.getDropAction(), e.getTargetActions(), CHANGED); + } + + /** + * Calls dragDropEnd on the listeners registered with this + * and with the DragSource. + * + * @param e - the DragSourceDropEvent + */ + public void dragDropEnd(DragSourceDropEvent e) + { + if (dragSourceListener != null) + dragSourceListener.dragDropEnd(e); + + DragSource ds = getDragSource(); + DragSourceListener[] dsl = ds.getDragSourceListeners(); + for (int i = 0; i < dsl.length; i++) + dsl[i].dragDropEnd(e); + } + + /** + * Calls dragMouseMoved on the listeners registered with the DragSource. + * + * @param e - the DragSourceDragEvent + */ + public void dragMouseMoved(DragSourceDragEvent e) + { + DragSource ds = getDragSource(); + DragSourceMotionListener[] dsml = ds.getDragSourceMotionListeners(); + for (int i = 0; i < dsml.length; i++) + dsml[i].dragMouseMoved(e); + } + + /** + * Returns the Transferable set with this object. + * + * @return the transferable. + */ + public Transferable getTransferable() + { + return transferable; + } + + /** + * This function sets the drag cursor for the specified operation, actions and + * status if the default drag cursor is active. Otherwise, the cursor is not + * updated in any way. + * + * @param dropOp - the current operation. + * @param targetAct - the supported actions. + * @param status - the status of the cursor (constant). + */ + protected void updateCurrentCursor(int dropOp, int targetAct, int status) + { + if (! useCustomCursor) + { + Cursor newCursor = null; + switch (status) + { + default: + targetAct = DnDConstants.ACTION_NONE; + case ENTER: + case CHANGED: + case OVER: + int action = dropOp & targetAct; + if (action == DnDConstants.ACTION_NONE) + { + if ((dropOp & DnDConstants.ACTION_LINK) != 0) + newCursor = DragSource.DefaultLinkNoDrop; + else if ((dropOp & DnDConstants.ACTION_MOVE) != 0) + newCursor = DragSource.DefaultMoveNoDrop; + else + newCursor = DragSource.DefaultCopyNoDrop; + } + else + { + if ((dropOp & DnDConstants.ACTION_LINK) != 0) + newCursor = DragSource.DefaultLinkDrop; + else if ((dropOp & DnDConstants.ACTION_MOVE) != 0) + newCursor = DragSource.DefaultMoveDrop; + else + newCursor = DragSource.DefaultCopyDrop; + } + } + + if (cursor == null || ! cursor.equals(newCursor)) + { + cursor = newCursor; + DragSourceContextPeer p = peer; + if (p != null) + p.setCursor(cursor); + } + } + } +} // class DragSourceContext |